If the meter isn't real deep you might be able to loosen the discharge union at the meter to relieve the pressure enough to make a decent solvent weld connection. Stick a piece of white bread or a balloon in the pipe to keep the water from dribbling out (if needed).

What sprinkus said..

I would have my guys pull the meter out and make my repair. Then, Put the meter back in the yoke/union and also call the water dept to come
REPLACE the curb stop since it wont shut off. They should have no issues doing it.

What is this "backflow device" yall keep mentioning?!?!?! just kidding guys i know what one is but it seems as if nobody around here that does irrigation does. I am trying to do my best to learn the proper way to irrigate but yet all i find around here ir jerry rigging and cut corners. I look at all that as lessons of how not to do things. It's raining like hell here still but as soon as it stops i am going to attack this problem and get the ol gal fixed. i am actually going to use the white bread method trick first thing because i think its cool.